How are repeating email text blocks represented in Spreadsheet?

In a normal case you'll get a spreadsheet were one row represents one parsed email. Each row will contain columns corresponding to the parsing rules of your inbox.

In case you are parsing repeating text blocks like line-items, the default behaviour is as follows:

Each parsed line-item will produce one row inside your spreadsheet. This means that your spreadsheet will have potentially multiple rows for one email. Data fields which return one single value (e.g. "Order reference") will be added to each row in this case. You can switch off this behaviour by setting "Cell Structure" to "Append Horizontally". In this case, results are stacked to the right in case of multiple.